import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

public class MyTask2 implements Runnable{

    private Lock lock = new ReentrantLock();
    private final int MAX_COUNT = 10000;
    private int sharedCounter = 0;

    @Override
    public void run(){
        System.out.println("Starting! shared counter = " + sharedCounter);
        for (int i = 0; i < MAX_COUNT; i++) {
            lock.lock();
            try{
            sharedCounter++;
            } finally{
                lock.unlock();
            }
        }
        System.out.println("Done! Shared counter = " + sharedCounter );
    }
}